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https://www.readbyqxmd.com/read/29281673/taxonomic-differences-of-gut-microbiomes-drive-cellulolytic-enzymatic-potential-within-hind-gut-fermenting-mammals
#1
Emma C L Finlayson-Trick, Landon J Getz, Patrick D Slaine, Mackenzie Thornbury, Emily Lamoureux, Jamie Cook, Morgan G I Langille, Lois E Murray, Craig McCormick, John R Rohde, Zhenyu Cheng
Host diet influences the diversity and metabolic activities of the gut microbiome. Previous studies have shown that the gut microbiome provides a wide array of enzymes that enable processing of diverse dietary components. Because the primary diet of the porcupine, Erethizon dorsatum, is lignified plant material, we reasoned that the porcupine microbiome would be replete with enzymes required to degrade lignocellulose. Here, we report on the bacterial composition in the porcupine microbiome using 16S rRNA sequencing and bioinformatics analysis...
2017: PloS One
https://www.readbyqxmd.com/read/29259277/dental-caries-in-the-fossil-record-a-window-to-the-evolution-of-dietary-plasticity-in-an-extinct-bear
#2
Borja Figueirido, Alejandro Pérez-Ramos, Blaine W Schubert, Francisco Serrano, Aisling B Farrell, Francisco J Pastor, Aline A Neves, Alejandro Romero
During the late Pleistocene of North America (≈36,000 to 10,000 years ago), saber-toothed cats, American lions, dire wolves, and coyotes competed for prey resources at Rancho La Brea (RLB). Despite the fact that the giant short-faced bear (Arctodus simus) was the largest land carnivoran present in the fauna, there is no evidence that it competed with these other carnivores for prey at the site. Here, for the first time, we report carious lesions preserved in specimens of A. simus, recovered from RLB. Our results suggest that the population of A...
December 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29225404/setting-an-evolutionary-trap-could-the-hider-strategy-be-maladaptive-for-white-tailed-deer
#3
M Colter Chitwood, Marcus A Lashley, Christopher E Moorman, Christopher S DePerno
An evolutionary trap occurs when an organism makes a formerly adaptive decision that now results in a maladaptive outcome. Such traps can be induced by anthropogenic environmental changes, with nonnative species introductions being a leading cause. The recent establishment of coyotes (Canis latrans) into the southeastern USA has the potential to change white-tailed deer (Odocoileus virginianus) population dynamics through direct predation and behavioral adaptation. We used movement rate and bedsite characteristics of radiocollared neonates to evaluate their antipredator strategies in the context of novel predation risk in a structurally homogeneous, fire-maintained ecosystem...
2017: Journal of Ethology
https://www.readbyqxmd.com/read/29182674/genome-wide-analysis-of-the-diversity-and-ancestry-of-korean-dogs
#4
Bong Hwan Choi, Hasini I Wijayananda, Soo Hyun Lee, Doo Ho Lee, Jong Seok Kim, Seok Il Oh, Eung Woo Park, Cheul Koo Lee, Seung Hwan Lee
There are various hypotheses on dog domestication based on archeological and genetic studies. Although many studies have been conducted on the origin of dogs, the existing literature about the ancestry, diversity, and population structure of Korean dogs is sparse. Therefore, this study is focused on the origin, diversity and population structure of Korean dogs. The study sample comprised four major categories, including non-dogs (coyotes and wolves), ancient, modern and Korean dogs. Selected samples were genotyped using an Illumina CanineHD array containing 173,662 single nucleotide polymorphisms...
2017: PloS One
https://www.readbyqxmd.com/read/29167983/climate-change-can-alter-predator-prey-dynamics-and-population-viability-of-prey
#5
Guillaume Bastille-Rousseau, James A Schaefer, Michael J L Peers, E Hance Ellington, Matthew A Mumma, Nathaniel D Rayl, Shane P Mahoney, Dennis L Murray
For many organisms, climate change can directly drive population declines, but it is less clear how such variation may influence populations indirectly through modified biotic interactions. For instance, how will climate change alter complex, multi-species relationships that are modulated by climatic variation and that underlie ecosystem-level processes? Caribou (Rangifer tarandus), a keystone species in Newfoundland, Canada, provides a useful model for unravelling potential and complex long-term implications of climate change on biotic interactions and population change...
November 22, 2017: Oecologia
https://www.readbyqxmd.com/read/29110170/distribution-and-host-associations-of-ixodid-ticks-collected-from-wildlife-in-florida-usa
#6
Jeffrey C Hertz, Bambi C Ferree Clemons, Cynthia C Lord, Sandra A Allan, Phillip E Kaufman
A tick survey was conducted to document tick-host associations with Florida (USA) wildlife, and to determine the relative abundance and distribution of ixodid ticks throughout the state. The survey was conducted using collection kits distributed to licensed Florida hunters as well as the examination of archived specimens from ongoing state wildlife research programs. Collected tick samples were obtained from 66% of Florida counties and were collected from nine wildlife hosts, including black bear, bobcat, coyote, deer, gray fox, Florida panther, raccoon, swine, and wild turkey...
November 6, 2017: Experimental & Applied Acarology
https://www.readbyqxmd.com/read/29074881/rancher-reported-efficacy-of-lethal-and-non-lethal-livestock-predation-mitigation-strategies-for-a-suite-of-carnivores
#7
J D Scasta, B Stam, J L Windh
Pastoralists have dealt with livestock losses from predators for millennia, yet effective mitigation strategies that balance wildlife conservation and sustainable agriculture are still needed today. In Wyoming, USA, 274 ranchers responded to a retrospective survey, and rated the efficacy of predation mitigation strategies for foxes, dogs, coyotes, wolves, bobcats, mountain lions, bears, and birds (buzzards, eagles, hawks, ravens). Rancher reported efficacy of mitigation varied by predator species, mitigation strategy, and lethality of strategies, but not livestock type...
October 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29061166/toxoplasma-gondii-seroprevalence-and-genotype-diversity-in-select-wildlife-species-from-the-southeastern-united-states
#8
Richard W Gerhold, Pooja Saraf, Alycia Chapman, Xuan Zou, Graham Hickling, William H Stiver, Allan Houston, Marcy Souza, Chunlei Su
BACKGROUND: Toxoplasma gondii is a widespread protozoan parasite that infects humans and other animals. Previous studies indicate some genotypes of T. gondii are more frequently isolated in wildlife than agricultural animals, suggesting a wild/feral animal diversity model. To determine seroprevalence and genetic diversity of T. gondii in southeastern US wildlife, we collected sera from 471 wild animals, including 453 mammals and 18 birds, between 2011 and 2014. These serum samples were assayed for T...
October 23, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/29046813/single-nucleotide-polymorphisms-and-microsatellites-in-the-canine-glutathione-s-transferase-pi-1-gstp1-gene-promoter
#9
James Sacco, Sarah Mann, Keller Toral
BACKGROUND: Genetic polymorphisms within the glutathione S-transferase P1 (GSTP1) gene affect the elimination of toxic xenobiotics by the GSTP1 enzyme. In dogs, exposure to environmental chemicals that may be GSTP1 substrates is associated with cancer. The objectives of this study were to investigate the genetic variability in the GSTP1 promoter in a diverse population of 278 purebred dogs, compare the incidence of any variants found between breeds, and predict their effects on gene expression...
2017: Canine Genetics and Epidemiology
https://www.readbyqxmd.com/read/29038862/examining-spatial-patterns-of-selection-and-use-for-an-altered-predator-guild
#10
Matthew A Mumma, Joseph D Holbrook, Nathaniel D Rayl, Christopher J Zieminski, Todd K Fuller, John F Organ, Shane P Mahoney, Lisette P Waits
Anthropogenic disturbances have altered species' distributions potentially impacting interspecific interactions. Interference competition is when one species denies a competing species access to a resource. One mechanism of interference competition is aggression, which can result in altered space-use of a subordinate species due to the threat of harm, otherwise known as a 'landscape of fear'. Alternatively, subordinates might outcompete dominant species in resource-poor environments via a superior ability to extract resources...
December 2017: Oecologia
https://www.readbyqxmd.com/read/29030315/natural-history-of-ixodes-affinis-in-virginia
#11
Robyn M Nadolny, Holly D Gaff
The ixodid tick species Ixodes affinis is expanding its range northward, changing the tick community population dynamics in the Mid-Atlantic United States. We present five years of surveillance on newly established populations of I. affinis throughout southeastern Virginia and discuss the habitat and host associations of I. affinis in this northernmost extent of its range. We found that I. affinis populations tend to persist once they are established, and populations tend to increase as ecological succession progresses, provided a vegetated understory persists...
September 29, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28988304/levels-of-plasma-and-fecal-glucocorticoid-metabolites-following-an-acth-challenge-in-male-and-female-coyotes-canis-latrans
#12
Erika T Stevenson, Eric M Gese, Lorin A Neuman-Lee, Susannah S French
Knowledge of endocrine stress responses can be advantageous for understanding how animals respond to their environment. One tool in wildlife endocrinology is to measure the adrenocortical activity as a parameter of disturbance of animals. Fecal glucocorticoid metabolites (GCMs) provide a noninvasive assessment of adrenocortical activity. Using an adrenocorticotropic hormone (ACTH) challenge administered to 28 captive coyotes (Canis latrans), we measured the levels of plasma cortisol, and fecal cortisol and corticosterone metabolites (i...
October 7, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28981825/the-influence-of-sniffing-on-airflow-and-odorant-deposition-in-the-canine-nasal-cavity
#13
Alex D Rygg, Blaire Van Valkenburgh, Brent A Craven
Nasal airflow plays a critical role in olfaction by transporting odorant from the environment to the olfactory epithelium, where chemical detection occurs. Most studies of olfaction neglect the unsteadiness of sniffing and assume that nasal airflow and odorant transport are "quasi-steady," wherein reality most mammals "sniff." Here, we perform computational fluid dynamics simulations of airflow and odorant deposition in an anatomically accurate model of the coyote (Canis latrans) nasal cavity during quiet breathing, a notional quasi-steady sniff, and unsteady sniffing to: quantify the influence of unsteady sniffing, assess the validity of the quasi-steady assumption, and investigate the functional advantages of sniffing compared to breathing...
October 1, 2017: Chemical Senses
https://www.readbyqxmd.com/read/28938920/oral-vaccination-of-wildlife-using-a-vaccinia-rabies-glycoprotein-recombinant-virus-vaccine-raboral-v-rg-%C3%A2-a-global-review
#14
REVIEW
Joanne Maki, Anne-Laure Guiot, Michel Aubert, Bernard Brochier, Florence Cliquet, Cathleen A Hanlon, Roni King, Ernest H Oertli, Charles E Rupprecht, Caroline Schumacher, Dennis Slate, Boris Yakobson, Anne Wohlers, Emily W Lankau
RABORAL V-RG(®) is an oral rabies vaccine bait that contains an attenuated ("modified-live") recombinant vaccinia virus vector vaccine expressing the rabies virus glycoprotein gene (V-RG). Approximately 250 million doses have been distributed globally since 1987 without any reports of adverse reactions in wildlife or domestic animals since the first licensed recombinant oral rabies vaccine (ORV) was released into the environment to immunize wildlife populations against rabies. V-RG is genetically stable, is not detected in the oral cavity beyond 48 h after ingestion, is not shed by vaccinates into the environment, and has been tested for thermostability under a range of laboratory and field conditions...
September 22, 2017: Veterinary Research
https://www.readbyqxmd.com/read/28936111/agile-development-of-a-smartphone-app-for-perinatal-monitoring-in-a-resource-constrained-setting
#15
Boris Martinez, Rachel Hall-Clifford, Enma Coyote, Lisa Stroux, Camilo E Valderrama, Christopher Aaron, Aaron Francis, Cate Hendren, Peter Rohloff, Gari D Clifford
Technology provides the potential to empower frontline healthcare workers with low levels of training and literacy, particularly in low- and middle-income countries. An obvious platform for achieving this aim is the smartphone, a low cost, almost ubiquitous device with good supply chain infrastructure and a general cultural acceptance for its use. In particular, the smartphone offers the opportunity to provide augmented or procedural information through active audiovisual aids to illiterate or untrained users, as described in this article...
2017: Journal of Health Informatics in Developing Countries
https://www.readbyqxmd.com/read/28935611/introduction-of-canine-parvovirus-2-into-wildlife-on-the-island-of-newfoundland-canada
#16
Marta Canuti, Bruce Rodrigues, Hugh G Whitney, Andrew S Lang
Canine parvovirus-2 (CPV-2) and feline panleukopenia virus (FPV) (species Carnivore protoparvovirus 1, family Parvoviridae) cause a severe gastrointestinal disease associated with immune depression in a broad range of terrestrial carnivores. We report here the first molecular epidemiological investigation of protoparvoviruses on the Island of Newfoundland, Canada. In particular, we investigated red foxes (Vulpes vulpes deletrix) and lynx (Lynx canadensis subsolanus), two autochthonous species, and coyotes (Canis latrans), which immigrated onto the island during the 1980s...
September 18, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28904763/winter-bait-stations-as-a-multispecies-survey-tool
#17
Lacy Robinson, Samuel A Cushman, Michael K Lucid
Winter bait stations are becoming a commonly used technique for multispecies inventory and monitoring but a technical evaluation of their effectiveness is lacking. Bait stations have three components: carcass attractant, remote camera, and hair snare. Our 22,975 km(2) mountainous study area was stratified with a 5 × 5 km sampling grid centered on northern Idaho and including portions of Washington, Montana, and British Columbia. From 2010-14, we conducted 563 sampling sessions at 497 bait stations in 453 5 × 5 km cells...
September 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28899810/quantity-discrimination-in-canids-dogs-canis-familiaris-and-wolves-canis-lupus-compared
#18
Maria Elena Miletto Petrazzini, Clive D L Wynne
Accumulating evidence indicates that animals are able to discriminate between quantities. Recent studies have shown that dogs' and coyotes' ability to discriminate between quantities of food items decreases with increasing numerical ratio. Conversely, wolves' performance is not affected by numerical ratio. Cross-species comparisons are difficult because of differences in the methodologies employed, and hence it is still unclear whether domestication altered quantitative abilities in canids. Here we used the same procedure to compare pet dogs and wolves in a spontaneous food choice task...
November 2017: Behavioural Processes
https://www.readbyqxmd.com/read/28876360/all-about-neosporosis-in-brazil
#19
Camila Koutsodontis Cerqueira-Cézar, Rafael Calero-Bernal, Jitender Prakash Dubey, Solange Maria Gennari
Neospora caninum is protozoan parasite with domestic and wild dogs, coyotes and grey wolves as the definitive hosts and many warm-blooded animals as intermediate hosts. It was cultivated and named in 1988. Neosporosis is a major disease of cattle and has no public health significance. Since 1990's N. caninum has emerged as a major cause of abortion in cattle worldwide, including in Brazil. N. caninum also causes clinical infections in several other animal species. Considerable progress has been made in understanding the biology of N...
July 2017: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/28863171/studies-of-wolf-x-coyote-hybridization-via-artificial-insemination
#20
L David Mech, Cheryl S Asa, Margaret Callahan, Bruce W Christensen, Fran Smith, Julie K Young
Following the production of western gray wolf (Canis lupus) x western coyote (Canis latrans) hybrids via artificial insemination (AI), the present article documents that the hybrids survived in captivity for at least 4 years and successfully bred with each other. It further reports that backcrossing one of the hybrids to a male gray wolf by AI also resulted in the birth of live pups that have survived for at least 10 months. All male hybrids (F1 and F2) produced sperm by about 10 months of age, and sperm quality of the F1 males fell within the fertile range for domestic dogs, but sperm motility and morphology, in particular, were low in F2 males at 10 months but improved in samples taken at 22 months of age...
2017: PloS One
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